CUSTOM ORB ® 762 Traditional Corrugated Steel Cladding
CUSTOM ORB® 762
Traditional Corrugated Steel Cladding
CUSTOM ORB® 762
Minimum roof pitch
A special anti-capillary forming in the side lap allows you to use
CUSTOM ORB® 762 on roof pitches as low as 5 degrees (1 in
12). Sheet lengths of up to 24 m can be used before an
expansion joint is required.
ProfileLYSAGHT CUSTOM ORB® 762 is 762 mm wide coverage
profile with nominal 16 mm deep ribs. (Please refer fig. 1)
Material specifications
LYSAGHT CUSTOM ORB® 762 is manufactured out of high
strength steel grade with minimum yield strength of 550 MPa.
The coated steel is ZINCALUME® zinc/aluminium alloy-coated
steel complying with AS 1397, G550, AZ150 (550 MPa minimum
yield stress, 150 g/m2 minimum coating mass); or Clean
COLORBOND® pre-painted steel conforming to AS/NZS 2728 Type
3-4.
(Please refer to ZINCALUME® steel and Clean COLORBOND® steel brochure for details)
LengthsSheets are supplied custom cut.
TolerancesLength: + 10 mm, - 10 mm
Width: + 4 mm, - 4 mm
Cross Sectional View of Clean COLORBOND® steel
tBMT* TCT* Product kg/m2
0.35 0.40 ZINCALUME® steel /Clean COLORBOND® steel 3.67
0.42 0.47 ZINCALUME® steel 4.37Clean COLORBOND® steel
* Dimensions are in mm
Masses
Figure 1
LYSAGHT CUSTOM ORB® 762
762 mm
16 mm
Maximum support spacings
The maximum recommended support spacings are based on
testing in accordance with AS1562.1-1992, AS4040.1-1992 and
AS4040.2-1992.
Roof spans consider both resistance to wind pressure and light
roof traffic (traffic arising from incidental maintenance). Wall
spans consider resistance to wind pressure only.
Maximum roof lengths for drainage measured from ridgeto gutter (m)
Penetrations will alter the flow of water on a roof. For assistance
in design of roofs with penetrations, please seek advice from
your nearest BlueScope Lysaght Lanka office.
Limit states wind pressures
CUSTOM ORB® 762 offers the full benefits of the latest methods
for modeling wind pressures. The Wind pressure capacity table
is determined by full-scale tests conducted at BlueScope Steel's
NATA- registered testing laboratory, using the direct
pressure-testing rig.
Testing was conducted in accordance with AS 1562.1-1992
Design and Installation of Sheet Roof and Wall Cladding-Metal,
and AS 4040.2-1992 Resistance to Wind Pressure for
Non-cyclonic Regions.
The pressure capacities for serviceability are based on a
deflection limit of (span/120) + (maximum fastener pitch/30).
The pressure capacities for strength have been determined by
testing the cladding to failure (ultimate capacity). These
pressures are applicable when the cladding is fixed to a
minimum of 1.0 mm, G550 steel.
Metal & timber compatibility
Lead, copper, free carbon, bare steel and green or some
chemically treated timber is not compatible with this product. Do
not allow any contact of the product with those materials, nor
discharge of rainwater from them onto the product.
Supporting members should be coated to avoid problems with
underside condensation. If there are doubts about the
compatibility of other products being used, ask for advice from
your nearest BlueScope Lysaght Lanka office
Total Coated Thickness (mm)
Type of span 0.35 0.42
RoofsInternal Span 900 1200End Span 650 900
WallsInternal Span 1300 1800End Span 1000 1350
Maximum Support Spacings (mm)
Rainfall Roof SlopeIntensity
10 20 30 50 7.50 100
mm/hr
100 - - - 45 54 58LYSAGHT 150 - - - 30 35 38
CUSTOM ORB® 762 200 - - - 22 26 28Flow Area 250 - - - 18 21 23
300 - - - 14 11 19400 - - - 11 13 14
*Commonwealth Scientific & Industrial Research Organisation
Maximum Roof Run (m) as based on CSIRO* Formula
••••
Adverse conditions
If this product is to be used in marine, severe industrial, or
unusually corrosive environments, ask for advice from
your nearest BlueScope Lysaght Lanka office.
Maintenance
Optimum product life will be achieved if all external walls
are washed regularly. Areas not cleaned by natural rainfall
(such as the tops of walls sheltered by eaves) should be
washed down every six months.
Sealed joints
For sealed joints use screws or rivets and neutral-cure
silicone sealant branded as suitable for use with
galvanised or ZINCALUME® steel.
Storage and handling
Keep the product dry and clear of the ground. If stacked or
bundled product becomes wet, separate, and wipe it with
a clean cloth to dry thoroughly.
Handle materials carefully to avoid damage: don't drag
materials over rough surfaces or each other; don't drag
tools over material; protect from swarf.
Cutting
For cutting thin metal on site, we recommend a circular
saw with a metal cutting blade because it produces fewer
damaging hot metal particles and leaves less resultant
burr than does a carborundum disc.
Cut materials over the ground and not over other
materials.
Sweep all metallic swarf and other debris from roof areas
and gutters at the end of each day and at the completion
of the installation. Failure to do so can lead to surface
staining when the metal particles rust.
Non- Cyclonic Areas
The information in this brochure is suitable for use only in
areas where a tropical cyclone is unlikely to occur.
Ask for advice from your nearest BlueScope Lysaght
Lanka office on designs to be used in cyclonic areas.
InstallationFastening sheets to supports
CUSTOM ORB® 762 is pierce-fixed to steel or timber
supports. This means that fastener screws pass through
the sheeting. To maximize water tightness, always place
roof screws through the crests. For walling, you may use
either crest- or valley fixing. (Please refer fig. 2)
Always drive the screws perpendicular to the sheeting, and
in the center of the corrugation or rib.
Don't place fasteners less than 25 mm from the ends of
sheets.
Side-laps
CUSTOM ORB® 762 standard lap is 1.5 corrugations. It is
generally considered good practice to use fasteners along
side-laps however, when cladding is supported as
indicated in maximum support spacings; side-lap fasteners
are not usually needed.
End lapping
End-laps are not usually necessary because
CUSTOM ORB® 762 is available in long lengths. If end-
laps are used, complete each run of sheets from gutter to
ridge.
Seal end lap at both ends with a 3 mm bead of neutal cure
silicone sealant.
For roofs, allow a minimum end-lap of 200 mm for pitches
of 5 to 15 degrees, and 150 mm for pitches above 15
degrees. For walls, allow minimum endlaps of 100 mm.
Where you intend to end-lap CUSTOM ORB® 762 sheeting
with curved sections of CUSTOM ORB® 762, order them at the
same time to ensure a good fit.
Ends of sheets
It is usual to allow roof sheets to overlap into gutters by
about 50 mm. The valleys of sheets should be turned-
down at lower ends, and turned-up at upper ends. Use five
fastenings at the ends of sheets.
Laying procedure
For maximum weather-tightness, start laying sheets from
the end of the building that will be in the lee of the worst
anticipated or prevailing weather.
Lay sheets toward prevailing weather. It is much easier
and safer to turn sheets on the ground than up on the roof.
Before lifting sheets on to the roof, check that they are the
correct way up and the overlapping side is towards the
edge of the roof from which installation will start.
Place bundles of sheets over or near firm supports, not at
mid span of roof members.
CUSTOM ORB® 762Roof - Screw fix through rib
Wall - Screw fix through pan
Figure 2 - Fastening sheets to support
BlueScope Lysaght Lanka (Pvt) Limited 26 & 27, Sapugakanda Industrial Estate
Pattiwila Road, Sapugaskanda, SRI LANKA..Tel: +94 112 400 611-6 Fax: +94 112 400 618
Website: www.bluescopesteelasia.comEmail: [email protected] SL
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• Matara Tel: +94 41 2233870 [email protected]• Kandy Tel: +94 81 4939271 [email protected]• Anuradhapura Tel: +94 25 2234491 [email protected]• Kurunegala Tel: +94 37 2221102 [email protected]
Note:
No part of this brochure may be reproduced, stored in a retrieval system or transmitted in any form or by any means,electronic, mechanical, recording or otherwise, without written permission from BlueScope Lysaght Lanka.
LYSAGHT®, CUSTOM ORB®, Clean COLORBOND®, COLORBOND® and ZINCALUME® are registered trademarks ofBlueScope Steel Limited under license to BlueScope Lysaght Lanka.
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LYSAGHT CUSTOM ORB® 762 - Design Advantages
• CUSTOM ORB® 762 is a smooth sinusoidal profile offers flexibility of design for roof and
wall cladding application
• Long lasting ZINCALUME® and Clean COLORBOND® steel base
• Wider profile makes it quicker to cover large area in shortest possible time
• Strong, lightweight and economical
• It can be fixed quickly and easily
• Wall panels can be installed in horizontal as well as in vertical direction
• It can be curved for stylish architectural design (by using G300 grade material)
• Available in an attractive range of colors in Clean COLORBOND® steel and
in unpainted ZINCALUME® steel